Drywall screws, Phillips bugle head, Fine Thread, Sharp point, black phosphated.
干墙螺丝，十字喇叭头，细纹，尖头，磷化黑色。
Drywall screws, Phillips bugle head, Coarse Thread, Sharp point, black phosphated.
干墙螺丝，十字喇叭头，粗纹，尖头，磷化黑色。
Self drywall screws, Phillips bugle head, Fine Thread, Drill point, black phosphated.
自攻干墙螺丝，十字喇叭头，细纹，钻头，磷化黑色。
However, owing to many alloy elements, they are difficult to be phosphated which seriously affects their application in actual production.
但因含较多的合金元素，磷化处理较难，严重影响了在实际生产中的应用。
However, owing to many alloy elements, they are difficult to be phosphated which seriously affects their application in actual production.
但因含较多的合金元素，磷化处理较难，严重影响了在实际生产中的应用。
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